Speed-regulator for explosive-engines.



'No.761,5'99. I v PATENTED MAY 31,1904;

H. M. MGQALL. I

SPEED. REGULATOR FOR EXPLOSIVE ENGINES.

APPLICATION FILED JULY 14, 1903f 2-SHEETS-SHEET 1.

no MODEL.

Tn: Noam: P'IZTERS ca, mun-Inna, WASHINGYDN, u. c.

. PATENTBD MAY 31, 1904. -H. M. McGALL. 1 SPEED REGULATOR FOR EXPLOSIVEENGINES.

' APPLIOATION FILED JULY 14. 1903.

N0 MODEL. 2 SHEBTS-SHBBT 2;

[III/[1110A h /Y'VENTOR UNITED STATES- Patented May 31, 1904. I

PATEN OFFICE- HARRY M.QMCGALL, or rirrrssune, PENNSYLVANIA.

' I SPEED-REGULATOR OR, EXPL'OSWE-ENGINEVSY'.

.srEcIrIcATIoN forming part 6f Letters meat No. 761,599, dated May31,1904.

1'0' all whom it mcty con'ccrn:

Be it known thatLHARRx M. MoCALL, a citizen of the United States,residing at Pittsburg, I

in the county of Allegheny and State of Pennsylvania, have inventedcertain new and useful Improvements in Speed-Regulators forExplosive-Engines, of which thefollowing is a specification, referencebeing had therein to the accompanying drawings:

This invention has relation to speed-regulators for explosive-engines;and it consists in the novel construction and arrangement of its parts,as hereinafter shown and described.

- The object of the invention is to provide a mechanism used on largetypes of hydrocarbon-engines, .themechanism being so located that it iseasy of access and being so constructed that a nicety of adjustment maybe attained .toinsure the proper mixture of air and gasusedin thecharge. 4

I The type of valve to which the mechanism 7 is applicable. consists ofa casing having a valve adapted to move longitudinally thereintoregulatethe proportions-of air and gas con-. stituting the mixtureandto rotate within said casing to regulate the quantity of the mixturefed to the enginewithout changing the proportions of. air andgasconstituting the anism. Fig. 5 is a face View of the disk used on thevalve-stem. Fig. 6 is a top plan View of the support for said disk, andFig. 7 is a I top plan view of the connection between theApplieationfiled July 14, 1903;

valve-stem and the Fig; 2 is a, vertical sectional view ofthe typeofvalve to which the device is applicable.

s a r... 165,494. (Nomodel) valveoperating inech an1sm.. j t

The valve consists of the cas ng 1, having an air-inlet port 2 and agas-inlet port 3', with a mixture-outlet port 1 located between the two.The liningfor said casing 1 consists of.

a bushing 5, having at its upper end a series of ports 6, locatedopposite the chamber 7, which registers with the air-inlet port 2, saidbushinghavingat its lower end a series of openings 8, located oppositethe encircling j chamber 9, which registers with the gasrinlet port 3.The valve proper is located within the bushing 5 and consists of themembers 10 10, having space between their inner ends and being attachedto the stem 11, common to both. Each of the said members 10 10 isprovided with openings 12 12, 'whichcooperate with the openings 6 and 8of the air-inlet ports and gasinlet ports, respectively.

In the operation of the valve a longitudinal movement of the stem withrelation to the bushing 5 varies the proportions of the 'air withrelation to the gas, While a partial rotation of thevalve cuts oif boththe air and thev I gas,bu t does not changetheir relative proportions.In order to effect the movement of the valve proper above described in asuitable manner, the present invention is provided. The stem 11 of thevalve extends through the lower head of the valve-casing 1 and isprovided with'a thread 13. A portion of the said valve-stem 11 isflattened, as at 14, and is .provided with a graduating-scale 15... Theinternally-screw-threaded disk 16 is adapted to en gagethe thread 13 ofthe said stem-11 and passes vertically over the said scale 15. The disk16 is provided in its periphery with an annular groove 17, whichreceives the lower bifurcated end of the support 18 the upper end ofwhich is secured to the casing 1. The said support 18 retains the disk16 in a fixed horizontal position with relation to the casing 1, butpermits'the said disk to be rotated in a horizontal plane. As the saiddisk is rotated the thread thereof engaging the thread of the stem 11moves the said valve longitudinally in the bushing 5, the arrangement ofthe scale 15 being such as to indicate the movement of the valve withrelation to the bushing 5 as the units of thescale come into horizontalregister with either the upper or lower surface of the said disk 16. Thesaid disk may be rotated While the engine is at rest or in operation,and the ease of access to the connection between the said disk and thevalve-stem is of such a nature that a very delicate adjustment of thevalve may be attained at any time in order to effect the proper pro--portions of the elements constituting the mixture. For rotating thevalve with relation to the bushing 5 a mechanism is provided whichoperatively connects the valve-stem 11 with the governor mechanism,which in turn is operated by the crank-shaft of the engine, (not shownin the drawings,) said governor mechanism consisting of a rotating shaft19, carrying ayoke 20, to which the governorweight arms 21 arefulcrumed. Said arms carry at their lower end the weights 22 and havetheir upper ends slotted, as at 23, said slots receiving the pins 24,attached to the ring 25, which in turn is journaled to the sleeve 26,which receives in its central opening the upper end of the shaft 19. Thelower end of the collar 27 is received between the annular flanges 28,located at the upper end of the sleeve 26. The upper portion of thecollar 27 is pivotally connected to one end of the bell-crank lever 29,said bell-crank lever being fulcrumed at a point 30 to any convenientpart of the engine. One end of the rod 31 is pivoted to the other end ofthe bell-crank lever 29, and the opposite end of the said rod 31 ispivoted to the arm 32, which extends radially from the lower end of thevalve-stem 11. The said arm 31 passes through a guide 33, attached toany convenient part of the engine, and is provided with an adjustablenut 34, between which and the said guide 33 is interposed a coiltension-spring 35. The tension of said spring 35 is sufiicient tomaintain the governor-weights 22 22 in the nearest possible positionstoward each other, and consequently the tension of the said spring mustbe overcome by the centrifugal force operating upon the governor-weights22 before the rod 31 can be moved longitudinally.

The operation of the mechanism just above described is as follows: Theshaft 19 being in rotation, the governor weights 22 are revolved, thecentrifugal force spreading the said weights apart, which causes theupper ends of the arms 21 todescend,which, through the pins 2 1 and ring25 engaging the said arms, causes the sleeve 26 to descend along theshaft 19, the said sleeve carrying down with it the collar 27 whichdraws down the lower end of the bell-crank lever 29, causing the otherend of the said lever to describe an arc away from the valve-casing 1and causes the rod 31 to move longitudinally, overcoming the tension ofthe spring 35, as above described, and drawing around the arm 32 andpartially rotating the valve-stem 11, and thereby moving the openings 12in the valve members to one side with relation to the openings 6 and 8in the bushing 5 and reducing the quantity of the elements constitutingthe mixture without altering their proportions.

The above operation takes place as the speed of the engine accelerates,and as the speed diminishes the operation above described is reversed,caused by the extra tension placed on the spring 35, which moves the rod31 and its connection to their normal positions.

By adjusting the nut 34 on the rod 31 the tension of the spring 35 maybe regulated to require a greater or less amount ofcentrifugal force tooperate the governor-weights, and by so doing the speed of the enginemay be regulated to meet the conditions of the work to be performed.

Having described my invention, what I claim as new, and desire to secureby Letters Patent, is

A mechanism for operating a valve consisting of a casing having aprojecting valve-stem, a means for moving said valve longitudinally atwill consisting of a rotatable disk having a threaded perforationreceiving said valvestem, and a means for holding said disk in a fixedhorizontal position with relation to the valve-casing, a rod connectedto the stem and adapted to rotate the same, a governor mechanismconnected with and adapted to operate said rod, a spring engaging saidrod, the tension of which is opposed to the movement of the governor,said disk being adapted to be operated while the governor is inoperation and without disconnecting said rod.

In testimony whereof I afiix my signature in the presence of twowitnesses.

HARRY M. MGCALL.

Witnesses:

EARLE L. PRINCE, GEORGE CALVERT.

